My questions are:- Is it possible to use only 1 arduino card (whichever is best) to log 10 different pressure points? - What kind of pressure sensor should I use too? (It should read a range of 2 bars)
Couldn't you use an anemometer and calculate the pressure from the wind speed?
From my attempts (many years ago) to understand aerodynamics I believe one needs a very sensitive pressure sensor for a wind tunnel.And a wind tunnel is an expensive thing so it would not make any sense to use poor quality sensors....R
then get single valves and tee fittings.the sensor goes to the tee, the one line to the manifold, the other to a single valve, then to the tubing that goes to the point in the tunnel you want to measure.that way, you can easily connect all of them to a single point to calibrate. the manifold should be much larger dia.the manifold should have two points, the highest pressure you measure, and open to the room air.a third point in the middle will allow an additional reference point.
However, a simple installation of very cheap parts and offer some interesting insights.As a note, the flows, eddy currents, stagnation, boundary layers, etc will all cause effects.without getting into Reynolds Numbers, the general idea would be to just get a reading.I am assuming just fan and tunnel performance and not subject testing.
Which frequencies do you expect in the static pressure signals, which of these are of interest (signal bandwidth)?Shall pressure measured only at the walls, or also across the channel?